Rotary pump



A. P. DRON.

ROTARY PUMP.

0 APPLICATION FILED MAY 3!. 1919 V 1 ,363,315, Patented Dec. 28, 1920.

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5 INVENTOR 6' W$m A. P. DRON,

ROTARY PUMP. APPLICATIION FILED MAY3I, 1919.

1,363,315. Patented Dec. 28, 1920.

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ANDREW P. DROIT, OF

GFFICE.

FRESNO, CALIFORNIA.

ROTARY PUMP.

Application filed May 31,

To allwhom it may concern:

Be it known that I, ANDREW P. DRoN citizen of the United States, andresident of Fresno, in'the county of Fresno and the State of California,have invented a new and useful Improvement in Rotary Pumps, of which thefollowing is a specification.

My invention relates to pumps for raising liquids and which areespecially useful in wells having a long lift, one of the objects beingto have the pump near or below the water level. In pumping water fromwells it is desirable to have the power, whether a motor or engine,adjacent to the pump, which under the present state of the-art requirespits, expensive to construct and areusually unsafe. One object of myinvention is to have the motive power used to raise the water adjacentto the pumps without the need of a pit or long shaft. will behereinafter referred to.

' In the drawing accompanying this specification, Figure 1 is alongitudinal sectional view of the pump whenassembled. Fig. 2 is a crosssectional view along line U-$ in Fig.1. Fig. 3 is a cross sectional Viewalong line g in Fig. 1. Fig. 4 is a cross sectional view along line 22in Fig. 1. Fig. 5 is a view of the part of the pump which revolves. Fig.6 is a longitudinal sectional view of the pump showing an air inlet andcup seal, and a discharge opening into the casing. Fig. 7 is alongitudinal sectional View of the pump showing an outlet valve at thebottom. Fig. 8 is an enlarged view of cut seal.

' In said drawings D represents the well which is surrounded by a casingD K is a suction pipe which should extend some distance into the waterbelow the pump, its purpose being to at all times reach below the waterlevel. is the housing for the pumps hereinafter referred to. G is ahollow shaft, hereinafter more definitely referred to. G is a hollowextension of shaft G, the lower end of which rests in a thrust hearingor support 23. Support 23 is braced to housing F by means of braces 22and 22". II is a combination pump which consists of two centripetalpumps H and H and a centrifugal pump H These pumps have the same outsidediameter,.are formed integral, and are attached to hollow shaft G at oneend and to extension G at the other. The centrifugal pump is between thecentripetal pumps and they are constructed so that the pressure of theliquid discharged by each Other objects lubricating the bearings.

Specification of Letters Patent. Patent d D 28 1 20 1919. Serial No.301,046.

of the pumps is upward. Thus when the shaft Gr 1s being rotated in thedirection of the hands of a clock, the arrows 6 indicate that the waterfrom pipe K will be drawn lnto pipe G by centripetal pump H whichd1scharges the liquid into the intake opening of centrifugal pump Hwhich will then throw the water from hollow shaft G to a space withinthe housing F, which feeds the intake of centripetal pump H which thendrives the water back into the hollow shaft G from which it empties intoa discharge pipe C. 17 replresents the intake for centrlpetal pump and20 the vanes. 16 is the intake for the centrifugal pump H and 19 thevanes, and 15 is the intake for the centr petal pump H and 18 the vanes.Each of said pumps has a plurality of vanes, but relatlvely the numberof vanes in each of said pumps increase from the bottom upward, theobject being to have'each of the pumps perform the function of forcingthe water at a more rapid flow. In order to do the more effectively thedischarge openings of'the three pumps decrease in slze in their order,the smallest of said openings being the discharge into the shaft G.

B is a motor, which is inclosed by a water tight housing E. -Motor B isconstructed with the field magnet 3 attached to housing E, and rotor 4.-attached to hollow shaft G. 5 is a conduit for electric Wires 6, 7 and 8attached to the field magnet 3. 11 and 11 are eye supports attached tothe housing E to which rods or cableslO and 12 are attached for thepurpose of suspending the combmation pump and motor in a well; 14 is anoil pipe extending from the top of the well to the motor for the purposeof 13 and 13 are non-leaking bearings. 24 is a thrust hearing adapted tohold the weight of the re- VOlVil'lL' parts of the motor and the pump.

In Fig. 7 I have shown a similar device with the difference that thedischarge pipe G empties the water into the well above the motor and thehousing E is hermetically sealed by means of a pliable cup ring 27 whichis attached to the housing on the inside periphery while the outsideperiphery bears against the inside wall of the well. 27 a is a bracketon the housing for the purpose of supporting the cup ring 27. 28 is anoutlet valve which permits air from within the housing E to enter theportion of the well under the motor. In Fig. 6 the valve 28 issubstituted by a pipe 29 which conducts air to the well under the cupseal 27. The pipe 29 extends out of the top of the well. 30 is a slopinghood constructed over the motor and within the housing, the object beingto turn water which might drip through the housing to the outside edgeof the housing where it drips to the bottom and form whence it will beremoved through the valve 28 by suction from the well.

I claim as new and ask for Letters Patent:

1. In combination, a motor having a hollow rotor shaft, said shaft beingextended beyond the motor, a rotary pump attached to said extendedshaft, said pump having an outlet opening into the rotor shaft, substantially as described.

2. In combination a motor and a rotary pump having a common hollowshaft, :1 discharge opening from the pump into the hollow shaft, and awater tight housing inclosing the motor, substantially as described.

3. In combination, a motor and a centripetal pump having a common hollowshaft, said centripetal pump having its discharge opening into thehollow shaft, a water tight housing inclosing the motor, and means forsuspending the motor and pump attached into a well, substantially asdescribed.

4. In a device of the character described, the combination of a motorand a centripetal pump, a centrifugal pump and a centripetal pump,arranged in the order named and formed integral, a common hollow shaftpassing through the motor and connecting with the pumps, a water tighthousing inclosing the motor, a separate housing inclosing the pumps, anintake for one of the centripetal pumps having a lead outside thehousing, and a discharge from the other centripetal pump into the hollowshaft, the housing for the pumps being adapted to lead the water fromthe outlet of one pump to the intake of the next adjacent pump, andmeans for suspending the combined motor, pumps and housing into a well.

5. In a device of the character described the combination of a well, amotor incased in a water tight housing, and a rotary pump, the shaft forthe rotorof the motor being hollow, said rotary pump being adapted todischarge into the hollow shaft, a discharge pipe adapted to receive anddirect the How of the water from the hollow shaft, and means forsuspending the motor, housing, pump and discharge pipe into the well,substantially as described.

6. In a device of the character described the combination of a motor anda rotary pump having a common hollow shaft, the rotary pump having adischarge opening into said hollow shaft, and the hollow shaft beingadapted to empty into a discharge pipe, a water tight housing for themotor. and a water tight conduit for electric wires leading to themotor, and. leads for oil leading to the motor, and means for hangingsaid combination in a well, substantially as described.

ANDREW P. DRON. Witnesses:

DAVID ANDERSON, JOHN A. DRON.

